[libpng15] Paeth filter speed improvements from work by Siarhei Siamashka. This
changes the 'Paeth' reconstruction function to improve the GCC code
generation on x86. The changes are only part of the suggested ones;
just the changes that definitely improve speed and remain simple.
The changes also slightly increase the clarity of the code. In a
diff --git a/CHANGES b/CHANGES
index 07bc574..717135b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3680,6 +3680,11 @@
splits adjacent @ signs with a space; this changes the concatentation
token from @@@ to PNG_JOIN; that should work with all compiler
preprocessors.
+ Paeth filter speed improvements from work by Siarhei Siamashka. This
+ changes the 'Paeth' reconstruction function to improve the GCC code
+ generation on x86. The changes are only part of the suggested ones;
+ just the changes that definitely improve speed and remain simple.
+ The changes also slightly increase the clarity of the code. In a
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
